易混淆的单词： DefDEF

Hello . This is dick smith of def company .

你好，我是def公司的迪克史密斯。

Method definitions start with the def keyword .

方法定义由def关键字开始。

Wireless may become a key technology for the tomorrow 's minimally invasive surgical gear and their high def displays .

无线技术可能会成为未来一个进行外科微创手术和高分辨率显示的关键技术。

But high def takes up more memory , so a new kind of dvd , digital video or versatile disc , was needed .

但是高清要占用更多的记忆空间，因此需要新型的影碟，比如数字视频光碟或者数字多功能光碟。

You 'll find them before the class or trait keywords for types , before the val or var for fields , and before the def for methods .

你会在class，trait关键字前，val或者var前，以及方法的def前发现它们。